Title
Tunable induced circular dichroism in gels
Author
Yu Xue, Natalie Fehn, Viktoria Katharina Brandt, Michele Stasi, Job Boekhoven, Ueli Heiz, Aras Kartouzian
Year
2022
Journal
Chirality
Abstract
The ICD phenomenon has drawn a lot of attention in recent years in applicable fields such as chiral sensing and chiroptical devices. In this work, we first gaze at the issues of thin spin-coated films not being able to deliver consistent ICD signals. A hypothesis of the underlying problem is proposed through a brief elucidation of the spin-coating process. To confirm and eliminate the uncontrollable dynamic factors with spin coating, we then dedicate our efforts to develop a new gel system based on chiral L-/D-N′,N′-Dibenzoyl-cystine. Achiral dye molecules are intercalated in a DBC gel through a “one-step” preparation procedure. Compared to the former spin-coating system, significantly improved reproducibility of the new gel system is demonstrated. Besides, the ICD signals can be customized in a broad spectral range (wavelength tunability) by substituting dye molecules. Finally, we discuss the potential applications of this interesting system.
Instrument
J-810
Keywords
ICD, achiral, dye,